The Problem:

Beginning with Bluebeam Revu version 21.4 users have been reporting the following error when opening some files:

The Solution:

We've confirmed that Bluebeam is currently working on a solution for this issue, but in the interim, the solution is to roll back to version 21.3 while we wait for an official fix.

Step 1. - Verify your Version of Bluebeam Revu

 IMPORTANT: The following procedure is only intended for users of Bluebeam Revu who are using version 21.4 or above 

1. Open Revu if it is not open already
2. Press Revu in the top left of the screen
3. Select About to view your Bluebeam Revu Version.
4. If your version of Bluebeam Revu is less than 21.4 do not continue

Step 2. - Backup Your Preferences

Before following the procedure below to reset Revu, please save your Tool Sets and Profiles.

1. Open Revu if it is not open already
2. Press Ctrl+K to open Preferences
3. In the Preferences window click on Admin in the left column
4. Under the Options tab, click on the Backup button to backup your settings
5. When prompted, choose a location to save the zip folder containing your backed up settings
6. Click Save

Step 3. - Uninstall Bluebeam Revu

1. In the Windows search bar, type "remove" and select "Add or Remove Programs".
   
2. Search for Bluebeam Revu x64 21 in the list and click the kebab menu on the right side of the screen
   (the three dots ... )
3. Select Uninstall
   
4. Select Uninstall again to confirm
5. Follow the prompts to completely uninstall Bluebeam Revu

Step 4. - Install Bluebeam Revu 21.3

1. Download Bluebeam Revu version 21.3 from the following URL:
   https://downloads.bluebeam.com/software/downloads/21.3.0/BbRevu21.3.0.exe
2. Save the file to your computer
3. Once downloaded, double click the file to install Bluebeam Revu 21.3
4. Follow the prompts to install Bluebeam Revu 21.3

Step 5. - Restore your Preferences

1. Open Revu if it is not open already
2. DO NOT install the update:
   
3. Press Ctrl+K to open Preferences
4. In the Preferences window click on Admin in the left column
5. Under the Options tab, click on the Restore button to restore your settings
6. Click OK to continue.
7. When prompted, select the zip folder containing your backed up settings
8. Click Save
9. Press Alt+X to restore your toolchest